Toss the pork with the garlic, lime juice, salt, pepper and crumbled bay leaves. Refrigerate overnight.
Melt enough lard in a heavy pot to cover the pork. Pat the pork dry, add it to the pot and bring the fat to a very gentle bubble over medium-low heat.
Cook slowly, uncovered, for 2 to 2 1/2 hours, stirring now and then, until the pork is golden, tender and the moisture has cooked off. The bubbles will become small and quiet when it is ready.
Lift out the pork and pack it into clean, dry glass jars or a heatproof container.
Let the fat cool slightly, then pour it over the pork until completely covered. Cool, cover and refrigerate for up to 3 weeks.
To serve, scoop out pieces of pork with a little fat and fry in a hot skillet for 5 to 6 minutes until crisp and hot.